Quote:
Originally Posted by killboydotcom
Full Disclosure: I refer to the whole thing between the header and the cat-back as the "overpipe" since some companies sell it all as one piece as I understand it, with and without the race cat, and that's the direction I'm going with my build. There are other names for this section though, and it can be gotten in segments with several different labels like: over pipe, front pipe, joint pipe, test pipe, straight pipe, etc. I apologize for the confusion but there are too many labels for this section of the exhaust.
Free-flowing cat or non-cat shouldn't make much difference, they both flow plenty on N/A engine...FF cat flows about 95% of what a straight pipe will according to my tuner. (Owner of Forged Performance) +10hp/tq was best-case scenario to make a point for him - vs. header alone +tune, tune will give you that +10hp plus other benefits...he'd be lucky to get that out of over/front pipe without tune.
Thanks for approaching it the way you did, I'm always open to friendly discussion/debate and learning something new, so feel free to share any info you feel contradicts my understanding and I'll openly consider it.
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With only rescaling my MAF for grimmspeed intake + OFH using VGI's java program and steve's help, would really love to get it on the dyno and have the tune buttoned up, including timing, load comp, and POL fueling.
Perhaps IAT correction as well but that's harder to do right now with such little info out. Would have to get Drift Office or equivalent the car to accomplish that since I only grasp the basics of tuning these things.
Port + DI rescaling would be awesome as well.. that tuned area under the curve is sexy man, bet she's a blast to drive!